Fastener



Jan. 27, 1925.:

F. S. CARR FASTENER Filed March 8, 1921 lave-@202 l ked (7002 2 Patented Jan. 27, 11925.

UNlTE-D STATES iszaeav earner castes...

FRED s. CARR, or nnwron, MASSACHUSETTS, essrenon T0 CARR F STENER'Coi/r- PANY, OF CAMBRIDGE, 'MASSACHUSETTS, .A. CORPORATION; OF MAINE,

rAsTENna.

This invention pertains to improvementsin separable fasteners. It is among the objects of the invention to provide a fastener of simple construction in which a superior resistance to undesired separation when under lateral Strain is provided.

In the drawings, which show a preferred embodiment of my invention Figure 1 is an elevation of two pieces'of fabric held together by a preferred form of fastener Fig. 2 is a section on the line 2-2 of Fig.

1, being partly in elevation;

Fig. 3 is a front elevation of the preferred form of socket; and

Fig. 4. is a front elevation of the preferred form of stud illustrated in Fig. 2.

Referring to the drawings and to the preferred form of my invention selected for illustrative purposes, I have shown a fastener comprising a resilient stud cooperating with a socket having a stud-receiving aperture therein, the stud-receiving aperture being narrowed in at least one direction to provided against undesired separation of stud and socket by the resolution of forces arising from lateral strain between stud and socket. In the illustrated construction, the socket is adapted to be sewn to its carrying fabric and is springless, being a simple plate 5 having a stud-receiving aperture 6 which is narrowed toward one side as by the notch 7 Stitch-receiving apertures 8 are provided. The socket is preferably, as illustrated, flat and is very thin because it need not be provided with the usual upturned spring-retaining flange. The preferred form of Stud illustrated is adapted to be attached to the stud-carrying fabric 10 by the stud may be formed from a singlepiece of metal, avoiding the complexities of the usual bird-cage type of resilient stud. It will be understood, however, that any resilient stud, including the usual bird-cage type, may be used to advantage in connection with my invention The preferred form ofstud illustrated isjprovided with two slots transverse to its axis and preferably at right angle to each othen These slots 20 and 21 preferably extend 'into the base 22 of the stud a sufficient distance so that the resiliency principally arises from flexing of portions of the stud base. The stitch-receiving apertures are preferably, as illustrated, lo

cated out of line with the'slits in the base before described, so that the stud base need not be unduly increased in diameter to provide strength. r

lVhen the stud is entered in the socket and strain between them is exerted in a direction tending to urge the neck of the stud toward the narrowed portion 7 of the studreceiving aperture in the Socket, the stud will shift laterally in the socket a slight distance, enough to prevent separation of stud and socket by any resolution of forces likely to arise from normal lateral strains. This shifting will not, however, be sufficient to prevent separation of stud and socket by strain exerted in a separating direction at an ngle greater than that likely to arise from the resolution of forces under lateral strains between Stud and Socket. The socket is preferably attached to the socket-carrying fabric 30 with the notch or narrowed portion 7 toward the edge of the fabric, this being the direction of normal lateral strain between stud and socket.

While I have shown and described a preferred form of one embodiment of my invention, it will be understood that changes involving omission, substitution, alteration and reversal of parts, and even changes in the mode of operation, may be made without departing from the scope of my invention, which is best defined in the following claims.

Claims:

1. A separable fastener comprising a resilient stud having a head and a neck smaller than said head; a stud receiving aperture of less width than the normal transverse diameter of said head and having a narrowed eX- tension at that Side thereof in which the lateral-strain between the stud and socket is normally exerted and into which the neck of the stud may shift laterally suficiently to prevent disengagement of the stud from the socket under the resolution of forces arising from lateral strain, the width of such narrowed extension being less than that of said neck to limit the extent of entrance of said neck thereinto and sufliciently wide to permit such shifting movement of the neck thereint-oto lockthe stud and socket-against separation by normal lateral strains, while sufliciently narrow to permit disengagement thereof when separating force is applied in a direction substantially transverse "to the normal line of lateral strain.

2. A separable fastener comprising, in combination, a stud having a resilient head capable of collapsing laterally to a limited extent; anda' socket providing; a stud-receiving aperture: said aperture having a narrowed portion of a sizepartlyto receive the neck of the stud said narrowed portion extending in the direction of normal lateral strain between the stud and socket; the width of the narrowed portion and also the transverse diameter of the aperture being less than the width of the resilient head whereby the head must collapse laterally when it is forced into the aperture; said narrowed portionproviding means whereby separation of stud and socket arising from normal lateral strain is prevented, whereas such separation is permitted, even though the stud and socket are under lateral strain, when strain is exerted in a separate direction.

3. A separable fastener comprising, in combination, a stud having a resilienthead neck name to this specification.

vstrain is exerted at an angle greater than that arising from the resolution of forces under such normal strains, at an angle greater than that arising from the resolution of forces under lateral'strain between 'the stud and socket.

4. A socket for separable fasteners formed from a single sheet of metal so as to be flat and reversible, said socket having a centrally arranged and generally circular-stud-receiving aperture therein presenting a shallow rounded notch at one side thereof, said notch being arcuate and of less radius than the aperture and its center being offset relative to the center of the aperture, and means where- 'by thesocket may be attached to a fabric.

5. A. socket for separable fasteners formedfrom a single sheet of metal, having stitchreceiving apertures therethrough andhaving a generally circularstud-receiving aperture therein, presenting a shallow notch at one side thereof said socket flat and reversible.

In testimony whereof, I have signed my FRED s. CARE. 

